Usart baud value not working proper

[WildfootW]

I created a very simple file as below
but USART baud still working as 57600 which seems from ./inc/HAL/Atmel/Usart.hpp:26: Usart(uint32_t baud = 57600)

#pragma once

#include "auto_field.hpp"

#include "HAL/Atmel/Device.hpp"
#include "HAL/Atmel/Power.hpp"

using namespace HAL::Atmel;

struct Test
{
    typedef Test This;
    typedef Logging::Log<Loggers::Main> log;

    Usart0 usart0 = { 115200 };
    auto_var(pinTX, PinPD1<64>(usart0));

    typedef Delegate<This, decltype(pinTX), &This::pinTX> Handlers;

    Test() {}

    void loop()
    {
        log::debug(F("**Test**"));
    }

    void main() { while(true) loop(); }
};